\begin{table}
\centering
\begin{tabular}{lr}
\toprule
Country & Passed Attention Check\\
\midrule
\cellcolor{gray!6}{Brazil} & \cellcolor{gray!6}{0.66}\\
Germany & 0.59\\
\cellcolor{gray!6}{Italy} & \cellcolor{gray!6}{0.60}\\
Poland & 0.57\\
\cellcolor{gray!6}{USA} & \cellcolor{gray!6}{0.55}\\
\bottomrule
\end{tabular}
\end{table}